Construction of ultra-stable perovskite–polymer fibre membranes by electrospinning technology and its application to light-emitting diodes

Recently, organometallic halide perovskites have shown attractive application prospects in photoelectric devices depending on their excellent electro-optic properties. However, their poor stability has greatly limited their practical applications. Here, methylammonium lead tribromide (MAPbBr 3 ) crystals are protected by polystyrene (PS) fibre membranes using electrospinning technology. The MAPbBr 3 @PS composite fibre membranes fabricated in this work not only show strong photoluminescence properties but also excellent stability: 70% of the fluorescence intensity of MAPbBr 3 @PS is maintained after soaking in water for 30 days, 85% after leaving at 95 °C for 350 min, and 90% after irradiating under UV light for 100 h. The excellent stability of the MAPbBr 3 @PS fibre membranes may be attributed to the hydrogen bonds between the MAPbBr 3 crystal and the PS fibre. In addition, a high-brightness white-light-emitting diode based on MAPbBr 3 @PS fibre was fabricated, which fully demonstrates its application prospects in the field of colour conversion. © 2020 Society of Industrial Chemistry